题目内容：

    A headache is the feeling you get when your head hurts. Headaches can differ from very mild to incredibly powerful. They can last anywhere from 10 minutes to hours. Very bad headaches are called migraines. People who suffer from migraine headaches often need to take the day off from school or work and lie in bed all day.

Why do people get headaches? There are many possible causes. People who drink too much caffeine (in coffee or soft drinks, for example) or alcohol can end up with headaches. This is because these kinds of drinks take water away from the body. If the brain doesn’t have enough water, it gets smaller and pulls away from the head. This can be extremely painful. The best way to get rid of this kind of headache is just to drink lots of water.

Tension headaches happen when the body's muscles are too tight. When people feel stress, it is common for the muscles near the head to become tense. Tension headaches might also be caused by not getting enough sleep. Some people suffer from tension headaches for only short times but for other people, these kinds of headaches are a chronic problem that happens again and again. A massage (按摩) might help to stop a tension headache. If that doesn't help, you might need to see a doctor.

Headaches can also be caused by much bigger health problems. For example, a head or neck injury can cause them. Headaches can also be a warming sign of a heart attack.

1.In the article, how long can a headache last?

A.at least 10 hours. B.about 10 minutes.

C.from minutes to hours D.more than 10 hours.

2.Why can caffeine cause headaches?

A.Because it makes the head gets smaller.

B.Because it makes the skull gets bigger.

C.Because it takes water away from the body.

D.Because it gives the body too much water.

3.The word ''chronic'' in paragraph 3 have the same meaning with______.

A.terrific B.repeated

C.rare D.interesting

4.Why should someone with lots of headaches visit a doctor?

A.They might need to drink water. B.They might need to talk.

C.They might have a bigger problem. D.They might need more medicine.